* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    color: white;
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.profile-image-container {
    position: relative;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    border: 5px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.profile-image-container:hover {
    transform: scale(1.05);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
}

.image-placeholder:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.image-placeholder i {
    font-size: 3rem;
    margin-bottom: 10px;
}

.image-placeholder p {
    font-size: 0.9rem;
    text-align: center;
}

.profile-info {
    flex: 1;
}

.profile-info h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #00ff88, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-info h2 {
    font-size: 1.5rem;
    color: #87ceeb;
    margin-bottom: 8px;
    font-weight: 400;
}

.profile-info > p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.9);
}

.contact-item i {
    width: 20px;
    color: #00ff88;
}

.tab-navigation {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 10px;
    margin-bottom: 30px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    padding: 15px 25px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 140px;
    justify-content: center;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(0, 255, 136, 0.5);
    color: white;
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, #00ff88, #00d4ff);
    border-color: transparent;
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.3);
}

.tab-btn i {
    font-size: 1.1rem;
}

.content {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(0, 255, 136, 0.3);
    padding-bottom: 15px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-header i {
    color: #00ff88;
}

.about-content {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-content p {
    margin-bottom: 20px;
    text-align: justify;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.skill-category {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.skill-category h3 {
    color: #00ff88;
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-item {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), rgba(0, 212, 255, 0.1));
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(0, 255, 136, 0.2);
    transition: all 0.3s ease;
}

.skill-item:hover {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.2), rgba(0, 212, 255, 0.2));
    border-color: rgba(0, 255, 136, 0.4);
    transform: translateY(-2px);
}

.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.project-category {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.project-category h3 {
    color: #00d4ff;
    font-size: 1.4rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.project-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.project-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 20px;
    border-left: 4px solid #00ff88;
    transition: all 0.3s ease;
}

.project-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.2);
}

.project-item h4 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.project-item p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    line-height: 1.6;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.experience-item {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.experience-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 255, 136, 0.3);
}

.experience-header {
    margin-bottom: 20px;
}

.experience-header h3 {
    color: #00ff88;
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.company-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.company {
    color: #00d4ff;
    font-size: 1.1rem;
    font-weight: 600;
}

.department {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.experience-content ul {
    list-style: none;
    padding-left: 0;
}

.experience-content li {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.experience-content li::before {
    content: '▶';
    color: #00ff88;
    position: absolute;
    left: 0;
    top: 0;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.certification-item {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.certification-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 255, 136, 0.2);
}

.certification-item i {
    font-size: 2.5rem;
    color: #00ff88;
    margin-bottom: 15px;
    display: block;
}

.certification-item h4 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.certification-item p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    line-height: 1.5;
}

.footer {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer p {
    margin: 5px 0;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 20px;
    }
    
    .profile-section {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .profile-image-container {
        width: 150px;
        height: 150px;
    }
    
    .profile-info h1 {
        font-size: 2rem;
    }
    
    .tab-navigation {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 200px;
    }
    
    .content {
        padding: 20px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .project-list {
        grid-template-columns: 1fr;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .profile-info h1 {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .contact-info {
        align-items: center;
    }
}